I hit myself on the top of the head today trying to imitate Rafael Nadal's forehand. While I've never come quite as close to you guys in terms of severe injury I did feel like quite the dunce.
it happened recently,, 2 weeks ago. I was so pissed off, I hit the concrete wall with my bare hand for like 10 hits. then I crushed my right hand's pinky and ring finger's bone and damaged some nerves too.
still in recover, I just got a new guitar today and I can't play properly just few days ago I am able to use chopstick again but doctor says I need another 2 or 3 weeks for fully recover : (